CN106703433B - Prestressed fiber sheet combined assembly type tensioning device and construction method thereof - Google Patents
Prestressed fiber sheet combined assembly type tensioning device and construction method thereof Download PDFInfo
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- CN106703433B CN106703433B CN201611242169.3A CN201611242169A CN106703433B CN 106703433 B CN106703433 B CN 106703433B CN 201611242169 A CN201611242169 A CN 201611242169A CN 106703433 B CN106703433 B CN 106703433B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Abstract
A prestressed fiber sheet combined assembly type tensioning device comprises a tensioning end anchorage device, a tensioning reaction frame, a tensioning guide rod, a tensioning baffle and a jack; the tensioning end anchorage device comprises a U-shaped plate, an upper anchoring plate and a lower anchoring plate, the right end of the prestressed fiber sheet is clamped between the upper anchoring plate and the lower anchoring plate, the tensioning reaction frame comprises a connecting plate, a fixed plate and a bearing plate, and an anchoring connection structure is correspondingly arranged between the right side of the tensioning end anchorage device and the left side of the tensioning reaction frame. The invention also discloses a construction method of the prestressed fiber sheet combined assembly type tensioning device. The invention ensures that the center of gravity of the tensioning guide rod is basically consistent with that of the prestressed fiber sheet, and effectively solves the problem of eccentric stress in the tensioning process of the prestressed fiber sheet. The tensioning reaction frame, the U-shaped plate and the tensioning end anchorage device are connected in an assembling mode, the installation is convenient, the U-shaped plate can be disassembled after the tensioning of the prestressed fiber sheet is finished, the U-shaped plate can be reused, and the engineering cost is reduced.
Description
Technical Field
The invention belongs to the technical field of civil engineering structure reinforcing and repairing, and particularly relates to a prestressed fiber sheet combined assembly type tensioning device and a construction method thereof.
Background
In recent years, fiber sheets (including carbon fibers, basalt fibers and the like) have become a research and application hotspot in the field of civil engineering structure reinforcement and repair due to the unique advantages of light weight, high strength, corrosion resistance and convenient construction. The main disadvantage of the traditional reinforcing technology for sticking the fiber sheet is that the high strength characteristic of the fiber sheet cannot be exerted. A large number of researches show that the defect can be effectively overcome by applying prestress in advance before the fiber sheet is adhered, namely the strength utilization rate of the fiber sheet can be greatly improved after the prestress is applied to the fiber sheet.
The prior prestressed fiber sheet material reinforcing technology has the following outstanding problems: 1) eccentricity exists between the center of gravity of the tensioning screw rod and the center of gravity of the fiber sheet in the tensioning process of the fiber sheet, so that the fiber sheet is easily damaged; 2) the tensioning reaction frame is heavy in structure and complex and tedious in operation, the whole tensioning reaction frame needs to be kept on the structure after reinforcement construction is finished, the tensioning reaction frame cannot be reused, and the attractiveness of the structure is affected.
Disclosure of Invention
In order to solve the defects of the existing construction method of the tensioning end of the prestressed fiber sheet, the invention provides the prestressed fiber sheet combined assembly type tensioning device and the construction method thereof, wherein the prestressed fiber sheet combined assembly type tensioning device has the advantages of compact structure, simplicity in assembly, convenience in disassembly and reuse of a tensioning reaction frame and capability of avoiding the eccentric stress problem in the tensioning process.
In order to achieve the purpose, the invention adopts the following specific scheme: a prestressed fiber sheet combined assembly type tensioning device comprises a tensioning end anchorage device, a tensioning reaction frame, a tensioning guide rod 7, a tensioning baffle 12 and a jack 11;
the right end of the prestressed fiber sheet 1 is clamped in a tensioning end anchorage device, two tensioning guide rods 7 are arranged in parallel along the left-right horizontal direction, the tensioning end anchorage device, a tensioning reaction frame and a tensioning baffle plate 12 are sequentially sleeved on the two tensioning guide rods 7 from left to right, two ends of each tensioning guide rod 7 are respectively in threaded connection with a left locking nut 2 and a right locking nut 13, the right end of each left locking nut 2 is in contact with the left end face of the tensioning end anchorage device, and the left end of each right locking nut 13 is in contact with the left surface of the tensioning baffle plate 12; the body of the jack 11 and the end part of the piston rod are respectively matched with the right end of the tensioning reaction frame and the left surface of the tensioning baffle 12 in a jacking manner;
an anchoring connection structure is correspondingly arranged between the right side of the anchorage device at the tensioning end and the left side of the tensioning reaction frame;
the tensioning end anchorage comprises a U-shaped plate 19, an upper anchoring plate 14 and a lower anchoring plate 15, the right end of a prestressed fiber sheet 1 is clamped between the upper anchoring plate 14 and the lower anchoring plate 15, the upper anchoring plate 14 and the lower anchoring plate 15 are fixedly connected through a plurality of first high-strength bolts 5 arranged in an array, the open end of the U-shaped plate 19 is horizontally arranged rightwards, the front part and the rear part of the U-shaped plate 19 are respectively provided with a left guide hole 3 used for penetrating a tensioning guide rod 7 along the left-right horizontal direction, the upper anchoring plate 14 and the lower anchoring plate 15 are positioned in the U-shaped plate 19, the U-shaped inner wall of the U-shaped plate 19 is provided with a U-shaped positioning groove 23, the left side edge, the front side edge and the rear side edge of the upper anchoring plate 14 and the lower anchoring plate 15 are respectively positioned in the U-shaped positioning groove 23, the upper side surface of the middle part of the U-shaped plate 19 is provided with a groove 20 used for penetrating the prestressed fiber sheet 1, and the lower surface of the upper anchoring plate 14 and the lower anchoring plate 15 are uniformly provided with a plurality of anti-skid tooth grains, the length direction of each anti-skid insection is perpendicular to the length direction of the prestressed fiber sheet 1, the depth of each anti-skid insection is 0.5mm, and the distance between every two adjacent anti-skid insections is 4.8 mm.
The tensioning reaction frame comprises a connecting plate 21, a fixing plate 17 and a bearing plate 18, wherein a right guide hole 16 for penetrating through the tensioning guide rod 7 is formed in the front portion and the rear portion of the connecting plate 21 in the left-right horizontal direction, the connecting plate 21 is fixedly connected to the lower surface of the civil engineering structure beam through a second high-strength bolt 10, the right end edge of the fixing plate 17 is fixedly connected with the upper end edge of the bearing plate 18 to form an L-shaped plate-shaped structure, the fixing plate 17 is fixedly arranged on the lower surface of the connecting plate 21 through a third high-strength bolt 22, and the right side surface of the bearing plate 18 is in top pressure fit with the end portion of a piston rod of the jack 11.
Anchor connection structure includes a set of waist type hole 6 and a set of round hole 8 of in-band tapping, go up anchor board 14 and with anchor board 15's left side border align down, the length of going up anchor board 14 is less than anchor board 15's length down, a set of waist type hole 6 is from preceding then set up the right side portion at anchor board 15 down, the horizontal direction setting about all along is followed to the length direction in every waist type hole 6, a set of round hole 8 is from preceding then set up at connecting plate 21 left side portion, every waist type hole 6 all with a round hole 8 control correspond the setting.
A construction method of a prestressed fiber sheet combined assembly type tensioning device comprises the following steps:
1) cutting a prestressed fiber sheet 1: cutting a prestressed fiber sheet 1 with a proper length according to the length of the civil engineering structure beam, wherein the dimensions of the prestressed fiber sheet 1 are as follows: the width is 50mm, and the thickness is 1.4 mm;
2) processing and manufacturing a U-shaped plate 19, an upper anchoring plate 14 and a lower anchoring plate 15 of the anchorage device at the tensioning end, wherein the length of the upper anchoring plate 14 is 220mm, the length of the lower anchoring plate 15 is 240mm, and the thicknesses of the upper anchoring plate 14 and the lower anchoring plate 15 are both 12 mm;
processing and manufacturing a connecting plate 21, a fixing plate 17 and a bearing plate 18 of the tension reaction frame, and integrally bending an L-shaped plate-shaped structure formed by the fixing plate 17 and the bearing plate 18 of the tension reaction frame;
processing and manufacturing two tensioning guide rods 7, wherein the diameter and the length of each tensioning guide rod 7 are respectively 12mm and 1 m;
3) clamping the left end of the prestressed fiber sheet 1 to the lower surface of the left side of the civil engineering structure beam by using a fixed anchorage; placing the left end of a prestressed fiber sheet 1 between an upper anchoring plate 14 and a lower anchoring plate 15 of a tensioning-end anchorage device, strengthening the fastening friction force with the prestressed fiber sheet 1 in anti-skidding insections on the surfaces of the upper anchoring plate 14 and the lower anchoring plate 15, screwing a first high-strength bolt 5 to enable the upper anchoring plate 14 and the lower anchoring plate 15 to clamp the prestressed fiber sheet 1, pushing the upper anchoring plate 14 and the lower anchoring plate 15 into a U-shaped positioning groove 23 leftwards from an opening at the right end of a U-shaped plate 19, and enabling the prestressed fiber sheet 1 to pass through a groove 20 on the upper side of the middle part of the prestressed fiber sheet 1;
then installing a tension reaction frame: for the determination of the position of the tensioning reaction frame, the prestress value applied to the prestressed fiber sheet 1 is set to be 30% of the ultimate strength, the elongation of the prestressed fiber sheet 1 is 1.7%, the actual elongation of the prestressed fiber sheet 1 is obtained through calculation, the initial position of one end, close to a jack 11, of a tensioning end anchorage device is measured to be 5.1cm along the rightward tensioning direction, the position is the installation position of the tensioning reaction frame, a second high-strength bolt 10 is firstly used for fixedly connecting a connecting plate 21 to the lower surface of a civil engineering structure beam, and then a third high-strength bolt 22 is used for fixedly arranging a fixing plate 17 on the lower surface of the connecting plate 21;
4) and installing a tension end power driving mechanism: two tensioning guide rods 7 are inserted into the left guide hole 3 and the right guide hole 16, a tensioning baffle plate 12 is inserted into the right ends of the two tensioning guide rods 7, a jack 11 is placed between a bearing plate 18 and the tensioning baffle plate 12, a left locking nut 2 is screwed on the left ends of the two tensioning guide rods 7, and a right locking nut 13 is screwed on the right ends of the two tensioning guide rods 7;
5) stretching the prestressed fiber sheet 1: the jack 11 is connected to a hydraulic station through a hydraulic pipeline, the jack 11 is driven, the jack 11 pushes a tensioning baffle 12, the tensioning baffle 12 drives a U-shaped plate 19 of a tensioning end anchorage device to move rightwards through a tensioning guide rod 7, an upper anchoring plate 14 and a lower anchoring plate 15 synchronously move rightwards along with the U-shaped plate 19 under the limit of a U-shaped positioning groove 23 of the U-shaped plate 19, tensioning of the prestressed fiber sheet 1 is achieved, when a group of kidney-shaped holes 6 on the lower anchoring plate 15 of the tensioning end anchorage device are covered on a group of round holes 8 on a fixing plate 17 of a tensioning reaction frame in the tensioning process, reading of a hydraulic pressure meter on the hydraulic station is checked, the jack 11 is synchronously pressurized or unloaded to finely adjust a tension value, and prestress application to the prestressed fiber sheet 1 is completed after correct alignment;
6) fixing the tension end anchorage device: keeping the jack 11 in a load holding state, aligning the superposed position of the waist-shaped hole 6 reserved on the tensioning end anchorage device and the round hole 8 on the connecting plate 21, connecting the fourth high-strength bolt with the round hole 8, screwing the fourth high-strength bolt, filling the redundant part in the waist-shaped hole 6 with a U-shaped key to complete the fixation of the tensioning end anchorage device, and then unloading and dismantling the jack 11, the U-shaped plate 19, the tensioning guide rod 7 and the tensioning baffle plate 12.
In conclusion, the invention is suitable for the field of civil engineering structure repair, and compared with the existing construction method of the tensioning end of the prestressed fiber sheet, the construction method has the following outstanding advantages:
1. the invention uses the linear relation between the tension force and the elongation of the prestressed fiber sheet to position and install the tension reaction frame; the adopted tensioning end anchoring device realizes effective control of prestress tensioning through elongation control of the prestress fiber sheet, so that the prestress application process of the fiber sheet is more convenient.
2. The tensioning end anchorage device is not fixed by a tensioning guide rod, a waist-shaped hole is preset in a lower anchoring plate of the tensioning end anchorage device, and after prestress is applied to a fiber sheet, the tensioning end anchorage device is connected with an inner tapping round hole reserved in a fixing plate of a tensioning reaction frame by using a fourth high-strength bolt. The construction method has the advantages that the long-term prestress of the fiber sheet can be effectively ensured, the construction method is more stable and reliable, the tensioning guide rod can be detached after the prestress tensioning of the fiber sheet is finished, the problem of insufficient durability commonly existing in the construction method of tensioning the tensioning guide rod at the tensioning end of the traditional prestress fiber sheet is solved, and the problems that the tensioning guide rod is easily influenced by the external environment after being in service for a long time and the prestress loss of the fiber sheet is overlarge once the tensioning guide rod is corroded are effectively solved.
3. The prestressing force fiber sheet often can meet and stretch out the guide arm focus and the prestressing force fiber sheet focus between exist off-centre at the tensioning process, harm prestressing force fiber sheet's the condition, the U template that this application adopted places the stretch-draw guide arm in the stretch-draw end ground tackle outside, through the stretch-draw end ground tackle of U template assembly realize the stretch-draw to the carbon fiber board, make stretch-draw guide arm focus and prestressing force fiber sheet focus keep unanimous basically, effectively solved prestressing force fiber sheet tensioning in-process eccentric atress problem.
4. The tensioning reaction frame adopts a split assembly type design, the tensioning reaction frame is in assembly connection with an L-shaped plate-shaped structure formed by the connecting plate, the fixing plate and the bearing plate, and the frame plate can be disassembled after the tensioning of the prestressed fiber sheets is finished, so that the frame plate can be reused, and the engineering cost is reduced.
5. The U-shaped plate and the tensioning end anchorage are in assembled connection, the installation is convenient, the U-shaped plate can be disassembled after the tensioning of the prestressed fiber sheet is finished, the U-shaped plate can be recycled, and the engineering cost is reduced. The U-shaped positioning groove is arranged to limit the position of the tensioning end anchorage device, so that the tensioning end anchorage device is prevented from being separated from the U-shaped plate during tensioning operation.
Drawings
FIG. 1 is a schematic bottom view of the present invention prior to anchoring;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is an enlarged view of the U-shaped plate of FIG. 1;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a sectional view taken along line B-B of FIG. 3;
FIG. 6 is an enlarged view of the connecting plate of the present invention;
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6
Fig. 8 is an enlarged view of a fixing plate and a bearing plate in the present invention;
FIG. 9 is a cross-sectional view taken along line D-D of FIG. 8;
fig. 10 is a schematic horizontal cross-sectional view of the upper and lower anchor plates of the present invention.
Detailed Description
As shown in fig. 1 to 10, the prestress fiber sheet combined assembly type tensioning device of the invention comprises a tensioning end anchorage, a tensioning reaction frame, a tensioning guide rod 7, a tensioning baffle plate 12 and a jack 11;
the right end of the prestressed fiber sheet 1 is clamped in a tensioning end anchorage device, two tensioning guide rods 7 are arranged in parallel along the left-right horizontal direction, the tensioning end anchorage device, a tensioning reaction frame and a tensioning baffle plate 12 are sequentially sleeved on the two tensioning guide rods 7 from left to right, two ends of each tensioning guide rod 7 are respectively in threaded connection with a left locking nut 2 and a right locking nut 13, the right end of each left locking nut 2 is in contact with the left end face of the tensioning end anchorage device, and the left end of each right locking nut 13 is in contact with the left surface of the tensioning baffle plate 12; the body of the jack 11 and the end part of the piston rod are respectively matched with the right end of the tensioning reaction frame and the left surface of the tensioning baffle plate 12 in a jacking and pressing way;
an anchoring connection structure is correspondingly arranged between the right side of the anchorage device at the tensioning end and the left side of the tensioning reaction frame;
the tensioning end anchorage comprises a U-shaped plate 19, an upper anchoring plate 14 and a lower anchoring plate 15, the right end of a prestressed fiber sheet 1 is clamped between the upper anchoring plate 14 and the lower anchoring plate 15, the upper anchoring plate 14 and the lower anchoring plate 15 are fixedly connected through a plurality of first high-strength bolts 5 arranged in an array, the open end of the U-shaped plate 19 is horizontally arranged rightwards, the front part and the rear part of the U-shaped plate 19 are respectively provided with a left guide hole 3 used for penetrating a tensioning guide rod 7 along the left-right horizontal direction, the upper anchoring plate 14 and the lower anchoring plate 15 are positioned in the U-shaped plate 19, the U-shaped inner wall of the U-shaped plate 19 is provided with a U-shaped positioning groove 23, the left side edge, the front side edge and the rear side edge of the upper anchoring plate 14 and the lower anchoring plate 15 are respectively positioned in the U-shaped positioning groove 23, the upper side surface of the middle part of the U-shaped plate 19 is provided with a groove 20 used for penetrating the prestressed fiber sheet 1, and the lower surface of the upper anchoring plate 14 and the lower anchoring plate 15 are uniformly provided with a plurality of anti-skid tooth grains, the length direction of each anti-skid insection is perpendicular to the length direction of the prestressed fiber sheet 1, the depth of each anti-skid insection is 0.5mm, and the distance between every two adjacent anti-skid insections is 4.8 mm.
The tensioning reaction frame comprises a connecting plate 21, a fixing plate 17 and a bearing plate 18, wherein a right guide hole 16 for penetrating through the tensioning guide rod 7 is formed in the front portion and the rear portion of the connecting plate 21 in the left-right horizontal direction, the connecting plate 21 is fixedly connected to the lower surface of the civil engineering structure beam through a second high-strength bolt 10, the right end edge of the fixing plate 17 is fixedly connected with the upper end edge of the bearing plate 18 to form an L-shaped plate-shaped structure, the fixing plate 17 is fixedly arranged on the lower surface of the connecting plate 21 through a third high-strength bolt 22, and the right side surface of the bearing plate 18 is in top pressure fit with the end portion of a piston rod of the jack 11.
Anchor connection structure includes a set of waist type hole 6 and a set of round hole 8 of in-band tapping, go up anchor board 14 and with anchor board 15's left side border down align, the length of going up anchor board 14 is less than anchor board 15's length down, a set of waist type hole 6 is from preceding then set up the right side portion at anchor board 15 down, the length direction in every waist type hole 6 all sets up along controlling the horizontal direction, a set of round hole 8 is from preceding then set up at connecting plate 21 left side portion, every waist type hole 6 all with a round hole 8 control correspond the setting.
A construction method of a prestressed fiber sheet combined assembly type tensioning device comprises the following steps:
1) cutting the prestressed fiber sheet 1: cutting a prestressed fiber sheet 1 with a proper length according to the length of the civil engineering structure beam, wherein the dimensions of the prestressed fiber sheet 1 are as follows: the width is 50mm, and the thickness is 1.4 mm;
2) processing and manufacturing a U-shaped plate 19, an upper anchoring plate 14 and a lower anchoring plate 15 of the anchorage device at the tensioning end, wherein the length of the upper anchoring plate 14 is 220mm, the length of the lower anchoring plate 15 is 240mm, and the thicknesses of the upper anchoring plate 14 and the lower anchoring plate 15 are both 12 mm;
processing and manufacturing a connecting plate 21, a fixing plate 17 and a bearing plate 18 of the tension reaction frame, and integrally bending an L-shaped plate-shaped structure formed by the fixing plate 17 and the bearing plate 18 of the tension reaction frame;
processing and manufacturing two tensioning guide rods 7, wherein the diameter and the length of each tensioning guide rod 7 are respectively 12mm and 1 m;
3) clamping the left end of the prestressed fiber sheet 1 to the lower surface of the left side of the civil engineering structure beam by using a fixed anchorage; placing the left end of a prestressed fiber sheet 1 between an upper anchoring plate 14 and a lower anchoring plate 15 of a tensioning-end anchorage device, strengthening the fastening friction force with the prestressed fiber sheet 1 in anti-skid insections on the surfaces of the upper anchoring plate 14 and the lower anchoring plate 15, screwing a first high-strength bolt 5 to enable the upper anchoring plate 14 and the lower anchoring plate 15 to clamp the prestressed fiber sheet 1, pushing the upper anchoring plate 14 and the lower anchoring plate 15 into a U-shaped positioning groove 23 from an opening at the right end of a U-shaped plate 19 to the left, and enabling the prestressed fiber sheet 1 to pass through a groove 20 on the upper side of the middle part of the prestressed fiber sheet 1;
then installing a tensioning reaction frame: for the determination of the position of the tensioning reaction frame, the prestress value applied to the prestressed fiber sheet 1 is set to be 30% of the ultimate strength, the elongation of the prestressed fiber sheet 1 is 1.7%, the actual elongation of the prestressed fiber sheet 1 is obtained through calculation, 5.1cm is measured along the right tensioning direction from the initial position of one end, close to the jack 11, of the tensioning end anchorage device, the initial position is the installation position of the tensioning reaction frame, the connecting plate 21 is fixedly connected to the lower surface of the civil engineering structure beam through the second high-strength bolt 10, and then the fixing plate 17 is fixedly arranged on the lower surface of the connecting plate 21 through the third high-strength bolt 22;
4) and installing a tension end power driving mechanism: two tensioning guide rods 7 are inserted into the left guide hole 3 and the right guide hole 16, a tensioning baffle plate 12 is inserted into the right ends of the two tensioning guide rods 7, a jack 11 is placed between a bearing plate 18 and the tensioning baffle plate 12, a left locking nut 2 is screwed on the left ends of the two tensioning guide rods 7, and a right locking nut 13 is screwed on the right ends of the two tensioning guide rods 7;
5) stretching the prestressed fiber sheet 1: the jack 11 is connected to a hydraulic station through a hydraulic pipeline, the jack 11 is driven, the jack 11 pushes a tensioning baffle plate 12, the tensioning baffle plate 12 drives a U-shaped plate 19 of a tensioning end anchorage device to move rightwards through a tensioning guide rod 7, an upper anchoring plate 14 and a lower anchoring plate 15 synchronously move rightwards along with the U-shaped plate 19 under the limit of a U-shaped positioning groove 23 of the U-shaped plate 19, the tensioning of the prestressed fiber sheet 1 is realized, when a group of waist-shaped holes 6 on the lower anchoring plate 15 of the tensioning end anchorage device are covered on a group of round holes 8 on a fixing plate 17 of a tensioning reaction frame in the tensioning process, the reading of a hydraulic pressure meter on the hydraulic station is checked, the jack 11 is synchronously pressurized or unloaded to finely adjust the tension value, and the prestress application to the prestressed fiber sheet 1 is completed after correct;
6) fixing the tension end anchorage device: keeping the jack 11 in a load holding state, aligning the superposed position of the waist-shaped hole 6 reserved on the tensioning end anchorage device and the round hole 8 on the connecting plate 21, connecting the fourth high-strength bolt with the round hole 8, screwing the fourth high-strength bolt, filling the redundant part in the waist-shaped hole 6 with a U-shaped key to complete the fixation of the tensioning end anchorage device, and then unloading and dismantling the jack 11, the U-shaped plate 19, the tensioning guide rod 7 and the tensioning baffle plate 12.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (2)
1. The utility model provides a prestressing force fiber sheet combination assembled tensioning equipment which characterized in that: comprises a tensioning end anchorage device, a tensioning reaction frame, a tensioning guide rod (7), a tensioning baffle (12) and a jack (11);
the right end of a prestressed fiber sheet (1) is clamped in a tensioning end anchorage device, two tensioning guide rods (7) are arranged in parallel along the left-right horizontal direction, the tensioning end anchorage device, a tensioning reaction frame and a tensioning baffle (12) are sequentially sleeved on the two tensioning guide rods (7) in a penetrating manner from left to right, two ends of each tensioning guide rod (7) are respectively in threaded connection with a left locking nut (2) and a right locking nut (13), the right end of the left locking nut (2) is in contact with the left end face of the tensioning end anchorage device, and the left end of the right locking nut (13) is in contact with the left side surface of the tensioning baffle (12); the body of the jack (11) and the end part of the piston rod are respectively matched with the right end of the tensioning reaction frame and the left surface of the tensioning baffle plate (12) in a jacking and pressing way;
an anchoring connection structure is correspondingly arranged between the right side of the anchorage device at the tensioning end and the left side of the tensioning reaction frame;
the tensioning end anchorage device comprises a U-shaped plate (19), an upper anchoring plate (14) and a lower anchoring plate (15), the right end of a prestressed fiber sheet (1) is clamped between the upper anchoring plate (14) and the lower anchoring plate (15), the upper anchoring plate (14) and the lower anchoring plate (15) are fixedly connected through a plurality of first high-strength bolts (5) arranged in an array manner, the open end of the U-shaped plate (19) is horizontally arranged rightwards, the front part and the rear part of the U-shaped plate (19) are respectively provided with a left guide hole (3) used for penetrating a tensioning guide rod (7) in the left-right horizontal direction, the upper anchoring plate (14) and the lower anchoring plate (15) are positioned in the U-shaped plate (19), the U-shaped positioning groove (23) is formed in the U-shaped inner wall of the U-shaped plate (19), the left side edges, the front side edges and the rear side edges of the upper anchoring plate (14) and the lower anchoring plate (15) are respectively positioned in the U-shaped positioning groove (23), a groove (20) used for penetrating through the prestressed fiber sheet (1) is formed in the upper side face of the middle of the U-shaped plate (19), a plurality of anti-skidding insections are uniformly arranged on the lower surface of the upper anchoring plate (14) and the upper surface of the lower anchoring plate (15), the length direction of each anti-skidding insection is perpendicular to the length direction of the prestressed fiber sheet (1), the depth of each anti-skidding insection is 0.5mm, and the distance between every two adjacent anti-skidding insections is 4.8 mm;
the tensioning reaction frame comprises a connecting plate (21), a fixing plate (17) and a bearing plate (18), wherein the front part and the rear part of the connecting plate (21) are respectively provided with a right guide hole (16) used for penetrating a tensioning guide rod (7) in the left-right horizontal direction, the connecting plate (21) is fixedly connected to the lower surface of the civil engineering structure beam through a second high-strength bolt (10), the right end edge of the fixing plate (17) is fixedly connected with the upper end edge of the bearing plate (18) to form an L-shaped plate-shaped structure, the fixing plate (17) is fixedly arranged on the lower surface of the connecting plate (21) through a third high-strength bolt (22), and the right side surface of the bearing plate (18) is in abutting fit with the end part of a piston rod of the jack (11);
anchor connection structure includes round hole (8) of a set of waist type hole (6) and a set of in-band tapping, go up anchor plate (14) and the left side border of anchor plate (15) down and align, the length of going up anchor plate (14) is less than the length of anchor plate (15) down, the right part of anchor plate (15) is seted up in a set of waist type hole (6) from preceding then, the length direction of every waist type hole (6) all sets up along controlling the horizontal direction, a set of round hole (8) are seted up in connecting plate (21) left part from preceding then, every waist type hole (6) all control with a round hole (8) and correspond the setting.
2. The construction method of the prestressed fiber sheet combination assembling type tension device according to claim 1, wherein: the method comprises the following steps:
1) and cutting the prestressed fiber sheet (1): cutting a prestressed fiber sheet (1) with a proper length according to the length of the civil engineering structure beam, wherein the dimensions of the prestressed fiber sheet (1) are as follows: the width is 50mm, and the thickness is 1.4 mm;
2) processing and manufacturing a U-shaped plate (19), an upper anchoring plate (14) and a lower anchoring plate (15) of the anchorage device at the tensioning end, wherein the length of the upper anchoring plate (14) is 220mm, the length of the lower anchoring plate (15) is 240mm, and the thicknesses of the upper anchoring plate (14) and the lower anchoring plate (15) are 12 mm;
processing and manufacturing a connecting plate (21), a fixing plate (17) and a bearing plate (18) of the tensioning reaction frame, and integrally bending an L-shaped plate-shaped structure formed by the fixing plate (17) and the bearing plate (18) of the tensioning reaction frame;
processing and manufacturing two tensioning guide rods (7), wherein the diameter and the length of each tensioning guide rod (7) are respectively 12mm and 1 m;
3) clamping the left end of the prestressed fiber sheet (1) to the lower surface of the left side of the civil engineering structure beam by using a fixed anchorage; placing the left end of a prestressed fiber sheet (1) between an upper anchoring plate (14) and a lower anchoring plate (15) of an anchorage device at a tensioning end, dividing anti-skid insections on the surfaces of the upper anchoring plate (14) and the lower anchoring plate (15) to enhance the fastening friction force with the prestressed fiber sheet (1), screwing a first high-strength bolt (5) to enable the upper anchoring plate (14) and the lower anchoring plate (15) to clamp the prestressed fiber sheet (1), pushing the upper anchoring plate (14) and the lower anchoring plate (15) into a U-shaped positioning groove (23) from an opening at the right end of a U-shaped plate (19) leftwards, and enabling the prestressed fiber sheet (1) to pass through a groove (20) on the upper side of the middle part of the prestressed fiber sheet (1);
then installing a tensioning reaction frame: for the determination of the position of the tensioning reaction frame, the prestress value applied to the prestressed fiber sheet (1) is set to be 30% of the ultimate strength, the elongation of the prestressed fiber sheet (1) is 1.7%, the actual elongation of the prestressed fiber sheet (1) is obtained through calculation, an initial position of one end, close to a jack (11), of a tensioning end anchorage device is used, 5.1cm is measured along the rightward tensioning direction, the position is the installation position of the tensioning reaction frame, a connecting plate (21) is fixedly connected to the lower surface of the civil engineering structure beam through a second high-strength bolt (10), and then a fixing plate (17) is fixedly arranged on the lower surface of the connecting plate (21) through a third high-strength bolt (22);
4) and installing a tension end power driving mechanism: two tensioning guide rods (7) are penetrated into a left guide hole (3) and a right guide hole (16), a tensioning baffle plate (12) is penetrated to the right ends of the two tensioning guide rods (7), a jack (11) is placed between a pressure bearing plate (18) and the tensioning baffle plate (12), a left locking nut (2) is screwed at the left ends of the two tensioning guide rods (7), and a right locking nut (13) is screwed at the right ends of the two tensioning guide rods (7);
5) and a tensioned prestressed fiber sheet (1): the jack (11) is connected to a hydraulic station through a hydraulic pipeline to drive the jack (11), the jack (11) pushes a tensioning baffle (12), the tensioning baffle (12) drives a U-shaped plate (19) of a tensioning end anchorage device to move rightwards through a tensioning guide rod (7), an upper anchoring plate (14) and a lower anchoring plate (15) synchronously move rightwards along with the U-shaped plate (19) under the limit of a U-shaped positioning groove (23) of the U-shaped plate (19) to stretch the prestressed fiber sheet (1), and when a group of waist-shaped holes (6) on the lower anchoring plate (15) of the tensioning end anchorage device cover a group of round holes (8) on a fixing plate (17) of a tensioning reaction frame in the process, reading of a hydraulic meter on the hydraulic station is checked, the jack (11) is synchronously pressurized or unloaded to finely adjust the tension value, and the prestress application to the prestressed fiber sheet (1) is completed after the jack is corrected without errors;
6) fixing the tension end anchorage device: keeping a jack (11) in a load holding state, aligning a waist-shaped hole (6) reserved on the tensioning end anchorage device with a position where a round hole (8) on a connecting plate (21) is overlapped, connecting a fourth high-strength bolt with the round hole (8), after the fourth high-strength bolt is screwed down, filling redundant parts in the waist-shaped hole (6) with a U-shaped key to finish fixing the tensioning end anchorage device, and then unloading and dismantling the jack (11), a U-shaped plate (19), a tensioning guide rod (7) and a tensioning baffle plate (12).
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| CN201611242169.3A CN106703433B (en) | 2016-12-29 | 2016-12-29 | Prestressed fiber sheet combined assembly type tensioning device and construction method thereof |
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| CN201611242169.3A CN106703433B (en) | 2016-12-29 | 2016-12-29 | Prestressed fiber sheet combined assembly type tensioning device and construction method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201635015U (en) * | 2010-03-16 | 2010-11-17 | 中交二航局第二工程有限公司 | Adjustable guy rope |
| CN205206350U (en) * | 2015-10-26 | 2016-05-04 | 四川省建筑科学研究院 | Prestressing force carbon fiber plate stretch -draw anchor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH701655B1 (en) * | 2008-02-08 | 2011-02-28 | Josef Scherer | Method and apparatus for prestressing reinforcement laminates to structures. |
| KR20100046462A (en) * | 2008-10-27 | 2010-05-07 | 한국전력공사 | A prestressing anchorage system of carbon fiber reinforced polymer plate for flexural strengthening of rc structures |
| CN101851985B (en) * | 2010-05-27 | 2012-08-08 | 卓清 | Articulated anchor and prestress tensioning method of high strength fibre composite sheet |
| CN203007855U (en) * | 2013-01-10 | 2013-06-19 | 江祥林 | Stretch-draw anchoring system of pre-stress fiber composite plate |
| CN203320978U (en) * | 2013-06-07 | 2013-12-04 | 华北水利水电大学 | Tensioning and anchoring device for prestressed carbon fiber sheet reinforced long-span concrete structure |
| CN103485546B (en) * | 2013-10-08 | 2016-09-07 | 魏拥军 | Carbon fiber plate pre-stress stretching device and method for stretching |
| CN204899230U (en) * | 2015-06-19 | 2015-12-23 | 深圳市威士邦建筑新材料科技有限公司 | Towed prestressing force carbon fiber plate tensioning equipment |
| CN105604331B (en) * | 2016-01-13 | 2018-05-08 | 同济大学 | A kind of pre- tensioning equipment of carbon fiber board for being used to reinforce square steel tube |
| CN205743030U (en) * | 2016-05-06 | 2016-11-30 | 西南交通大学 | Carbon fiber board mechanical grip anchorage and bracing means |
| CN206458118U (en) * | 2016-12-29 | 2017-09-01 | 华北水利水电大学 | A kind of pre-stress fibre sheet combination assembled tensioning equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201635015U (en) * | 2010-03-16 | 2010-11-17 | 中交二航局第二工程有限公司 | Adjustable guy rope |
| CN205206350U (en) * | 2015-10-26 | 2016-05-04 | 四川省建筑科学研究院 | Prestressing force carbon fiber plate stretch -draw anchor |
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